Creating Crispy Bang Bang Chicken can be straightforward if you follow these simple steps:

1. Prepare the Chicken: Cut the chicken into bite-sized pieces and set aside.
2. Marinate: Place the chicken pieces in a bowl and cover them with buttermilk. Let them marinate for at least 15 minutes.
3. Mix Dry Ingredients: In another bowl, combine the flour, garlic powder, onion powder, paprika, salt, black pepper, and cayenne pepper.
4. Prepare Panko: Place the panko breadcrumbs in a separate shallow dish.
5. Coat the Chicken: Remove the chicken from the buttermilk. First, dredge each piece in the flour mixture, then dip it back in the buttermilk, and finally coat it with panko breadcrumbs. Ensure each piece is evenly covered.
6. Heat the Oil: In a large skillet, heat about 1 inch of oil over medium-high heat until shimmering.
7. Fry the Chicken: Carefully add the coated chicken pieces to the hot oil, cooking in batches if necessary. Fry until golden brown and cooked through, about 5-7 minutes per side.
8. Drain: Use a slotted spoon to transfer the fried chicken to a plate lined with paper towels to drain excess oil.
9. Make the Bang Bang Sauce: In a bowl, whisk together mayonnaise, sweet chili sauce, sriracha, honey, and rice vinegar until smooth.
10. Toss the Chicken: In a large bowl, combine the fried chicken pieces with the Bang Bang sauce. Toss to coat evenly.
11. Garnish: Sprinkle sesame seeds and chopped green onions over the chicken for an added touch of flavor and aesthetic appeal.